External Validity - External Validity in Experiments

External Validity in Experiments

Many drawbacks can occur when following the experimental method. By the virtue of gaining enough control over the situation so as to randomly assign people to conditions and rule out the effects of extraneous variables, the situation can become somewhat artificial and distant from real life. There are two kinds of generalizability at issue:

  1. The extent to which we can generalize from the situation constructed by an experimenter to real-life situations (generalizability across situations), and
  2. The extent to which we can generalize from the people who participated in the experiment to people in general (generalizability across people)

Read more about this topic:  External Validity

Famous quotes containing the words external, validity and/or experiments:

    It is not a certain conformity of manners that the painting of Van Gogh attacks, but rather the conformity of institutions themselves. And even external nature, with her climates, her tides, and her equinoctial storms, cannot, after van Gogh’s stay upon earth, maintain the same gravitation.
    Antonin Artaud (1896–1948)

    There are ... two minimum conditions necessary and sufficient for the existence of a legal system. On the one hand those rules of behavior which are valid according to the system’s ultimate criteria of validity must be generally obeyed, and on the other hand, its rules of recognition specifying the criteria of legal validity and its rules of change and adjudication must be effectively accepted as common public standards of official behavior by its officials.
    —H.L.A. (Herbert Lionel Adolphus)

    My experiments did not turn out quite like yours, Henry. But science, like love, has her little surprises.
    William Hurlbut (1883–?)